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Washington Dulles International Airport Coordinates

VA, US · Elevation 95m

Quick answer: Washington Dulles International Airport is located at 38.944500, -77.455803 (N, W).

Different tools require different formats — Garmin devices default to DDM, military maps use MGRS, topo maps use UTM, and web apps expect Decimal Degrees. Copy whichever format your device or application needs. Click any format abbreviation to learn how it works.

All Coordinate Formats

DD

Decimal Degrees

38.944500, -77.455803
DMS

Degrees Minutes Seconds

38°56'40.20"N 77°27'20.89"W
DDM

Degrees Decimal Minutes

38°56.6700'N 77°27.3482'W
UTM

Universal Transverse Mercator

18S 287168 4313486
MGRS

Military Grid Reference

18STJ8716813486
Geohash

Geohash Encoding

dqbvt3wkh
Plus Code

Open Location Code

87C4WGVV+W4

Map Location

Map data © OpenStreetMap contributors

Antipodal Point

The point on the exact opposite side of Earth from Washington Dulles International Airport. If you drilled straight through the planet's center, you would emerge here.

Antipodal coordinates

-38.944500, -77.455803

Hemisphere: S, W

DD

Decimal Degrees

-38.944500, -77.455803
DMS

Degrees Minutes Seconds

38°56'40.20"S 77°27'20.89"W
DDM

Degrees Decimal Minutes

38°56.6700'S 77°27.3482'W
UTM

Universal Transverse Mercator

18H 287168 5686514
MGRS

Military Grid Reference

18HTB8716886514
Geohash

Geohash Encoding

630fmqq7u
Plus Code

Open Location Code

47H43G4V+84

MGRS Decoded

MGRS encodes location as a nested hierarchy — zone, band, grid square, and offsets. Here is what each component of 18STJ8716813486 means.

Component Value Meaning
UTM Zone 18 One of 60 vertical slices of Earth (6° wide each). Zone 18 runs -78° to -72° longitude.
Latitude Band S One of 20 horizontal bands (8° tall each), lettered C–X (skipping I and O). Indicates the general latitude region.
100 km Square TJ A 100 × 100 km grid square within the zone/band. Column letter T (west–east) and row letter J (south–north).
Easting 87168 Distance east within the 100 km square. 5-digit value = 10 m resolution. Multiply by 1 to get meters.
Northing 13486 Distance north within the 100 km square. Same resolution as easting (10 m).

Geohash Precision

A geohash encodes coordinates by subdividing the Earth into progressively smaller cells. Each extra character roughly halves the cell area. The table below shows Washington Dulles International Airport's geohash at every precision level alongside the bounding box each level represents.

Length Geohash Cell Size
1
d
≈ 5,000 × 5,000 km
2
dq
≈ 1,250 × 625 km
3
dqb
≈ 156 × 156 km
4
dqbv
≈ 39 × 20 km
5
dqbvt
≈ 4.9 × 4.9 km
6
dqbvt3
≈ 1.2 km × 610 m
7
dqbvt3w
≈ 153 × 153 m
8
dqbvt3wk
≈ 38 × 19 m
9
dqbvt3wkh
≈ 4.8 × 4.8 m

Precision 9 (highlighted) is the default and provides sub-5-metre accuracy for most applications.

About Washington Dulles International Airport

https://en.wikipedia.org/wiki/Washington_Dulles_International_Airport

Live Converter

The coordinates above are fixed to this landmark. Use this converter to enter any other coordinates — such as a nearby trailhead, parking area, or a location you want to compare — and get all 7 formats instantly.

DD

38.944500, -77.455803

DMS

38°56'40.20"N 77°27'20.89"W

DDM

38°56.6700'N 77°27.3482'W

UTM

18S 287168 4313486

MGRS

18STJ8716813486

GH

dqbvt3wkh

OLC

87C4WGVV+W4

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